Crystal structures

The article presents some theoretical foundations to solve the problem of dynamic control and optimizing the structure of multifunctional carbon nanofiber-reinforced material plates with integrated piezoelectric crystal.

13p viling 11-10-2024 0 0   Download

This paper investigates the vibration characteristics of a commonly employed mechanical structure, the cantilever beam, concerning its potential for direct electricity harvesting from piezoelectric crystals. Piezoelectric materials are renowned for their ability to generate electric charges when subjected to mechanical stress.

9p viyoko 01-10-2024 4 1   Download

The Mn-doped MoS2 (Mn-MoS2) material is fabricated by a facile onestep calcination method. The Mn2+ content introduced into MoS2 is ranged from 1 wt% to 7 wt%. The X-ray diffraction (XRD) and scanning electron microscopy SEM results suggest that the doping of Mn2+ does not alter the crystal structure and the morphology of MoS2.

5p vikwong 29-09-2024 2 1   Download

Non-metallic C, N, and S doped TiO2 materials were prepared using the hydrothermal method from titanyl sulfate solution with different doped precursors. The influence of non-metallic elements on crystal structure, morphology, surface area, bonding state, and light absorption ability of materials was studied through XRD, SEM, BET spectra, and UVis - DRS.

5p vikwong 29-09-2024 3 1   Download

In this work, Ag(Cu)InS2 semiconductor nanoparticles were synthesized via microwave and solvothermal methods. The effects of synthetical parameters on the structure and morphology of the nanoparticles were characterized by XRD, SEM, TEM, UV–Vis, and EDX. The experimental results reveal that the AgInS2 compound can be crystallized in two different phases, which are tetragonal and orthorhombic.

6p vikwong 29-09-2024 2 1   Download

A series of Mg-Cu-Al hydrotalcite/chitosan materials have been synthesized via a co-precipitation method, in which chitosan is synthesized from chitin extraction from waste shrimp shells. The obtained solids were characterized by XRD, BET, EDX, IR techniques. The materials have a well crystallized hydrotalcite structure and medium surface area.

5p vikwong 29-09-2024 3 1   Download

This study revealed that the major contributing descriptors of 2D QSAR studies are DeltaEpsilonB and DeltaPsiA and 3D QSAR model proves the steric as well as electrostatic effects determine the binding affinity for the drug development. The results of the current computational studies are useful for further designing novel chemical entities of anti-microbial agent.

19p dianmotminh02 03-05-2024 7 2   Download

TiO2 nanoparticles with crystallite size less than 15 nm were prepared from TiCl4 precursor by a modified sol-gel route. As-prepared TiO2 nanoparticles were extensively characterized using X-ray diffractometry, and their crystallite size was calculated using Debye-Scherrer formula.

11p viohoyo 25-04-2024 5 2   Download

Amorphous alloy ribbons of (Fe50Ni50)73.5Si13.5B9Nb3Cu1 were fabricated by rapid cooling technique on single copper wheel. After fabrication, the crystalline structure of the ribbons were examined by X-ray diffraction method. The results show that the samples possess a complete amorphous state.

6p viberkshire 09-08-2023 12 5   Download

The recent advances in the study of the unique capabilities of monolayer crystals had predicted piezoelectricity in two-dimensional (2D) group IV chalcogenides which are not present in their bulk forms. In this study, the predicted piezoelectric properties of was experimentally explored through Piezoelectric Force Microscopy (PFM). Tin Sulfide (SnS), Tin Selenide (SnSe), Germanium Sulfide (GeS), were exfoliated from their bulk forms by the top down methods of liquid sonication, while and Tin Disulfide (SnS2) mechanically exfoliated by tape.

82p runthenight04 02-02-2023 9 3   Download

In particular, the system undergoes three stages. At first stage the relaxation proceeds slowly so that the energy of system slightly decreases and the samples structure remains amorphous. Within second stage a structural transformation occurs which significantly changes PRDF and DCN for the relatively short time. The energy of the system is dropped considerably and the amorphous structure transforms into the crystalline. Finally, the crystalline sample undergoes the slow relaxation which reduces the energy of system and eliminates structural defects in crystal lattices.

17p runordie3 27-06-2022 18 3   Download

Acta Crystallographica Section C: Structural Chemistry specializes in the rapid dissemination of high-quality detailed studies of novel and challenging crystal and molecular structures of interest in the fields of chemistry, biochemistry, mineralogy, pharmacology, physics and materials science. The unique checking, editing and publishing facilities of the journal ensure the highest standards of structural reliability and presentation, while providing for reports on studies involving special techniques or difficult crystalline materials.

22p runordie3 27-06-2022 11 2   Download

The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres.

28p extraenglish 24-05-2021 14 4   Download

The main theme of the dissertation: The dissertation targets the basic research on the physical models and new structures; calculating and simulating the bistable devices using 1D, 2D PhC structures. The effects of the PhC configuration and structural parameters on the optical characteristics and working performance of bistable devices will be investigated.

28p extraenglish 24-05-2021 22 4   Download

The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres.

28p capheviahe27 23-02-2021 16 3   Download

The dissertation targets the basic research on the physical models and new structures; calculating and simulating the bistable devices using 1D, 2D PhC structures. The effects of the PhC configuration and structural parameters on the optical characteristics and working performance of bistable devices will be investigated.

28p capheviahe27 23-02-2021 13 3   Download

At a temperature of 300 K, both Ni and Cu atoms are crystallized into the face-centered cubic (FCC) and the hexagonal close-packed (HCP) phases, respectively. The mechanical characteristics of the sample at 300 K were also analyzed in detail through the determination of elastic modulus, number of atoms, and void distribution during the tensile process.

8p tamynhan5 10-12-2020 15 3   Download

In the present work, we use various routes, such as sol-gel, hydrothermal and solid state reaction methods, to synthesize zirconium titanate (ZrTiO4) and investigate the crystal structure, particle size distribution, morphology and optical properties of the calcined powders.

9p tamynhan8 04-11-2020 14 1   Download

The synthesis and structures of yttrium(III) complexes containing 2- naphthoyltrifluoroacetone (HTFNB); benzoyltrifluoroacetone (HTFPB) and N,N-dimethylN’-(9-methylanthracenyl)ethylenediamine (AnMe2) ligand are reported. The complexes have been characterized by IR, 1H NMR and single-crystal X-ray diffraction studies. The crystal structure of Y(TFNB)3AnMe2 (C3) and Y(TFPB)3AnMe2 (C4) were determined. X-ray crystallographic analysis demonstrates that in the mononuclear complex C3, C4, the Y3+ ion was coordinated by three TFNB/TFPB ligands and one ancillary ligand AnMe2.

8p koxih_kothogmih5 04-09-2020 28 3   Download

In this work, we use molecular dynamic (MD) simulation to study the structure transition and crystallization of amorphous silica (SiO2) under compression. The structural evolution of amorphous SiO2 is explained through radial distribution function, coordination number distribution, bond angle distribution and visualization.

10p tamynhan6 14-09-2020 13 2   Download